Measuring device



Nov. 29, w49 o. L. 'SWMSQNy 2,489,597

MEASURING DvcE Filed oct. 8, 194e 2 sheets-sheet 1 h--II' v INVENTOK Osca. 7 L.5wanson BY f v NOV 29, i949 0.7L. swANsoN -2,489,597

MEASURING DVI-CE Filed 001,. 8', 1946 2 Sheets-Sheet 2 Patented Nov. 29, `1949 UNITED STATES PATENT OFFICE MEASURING DEVICE Oscar L. Swanson, Erie, Pa.

Application October 8, 1946, Serial No. 701,919

8 Claims.

This invention relates generally to measuring devices and more particularly to measuring devices for determining the Iconcentricity of a plurality of outside and inside diameters of a cylindrical workpiece.

In determining the concentricity of a cylindrical workpiece with several outside diameters and bores in the ends thereof, it has heretofore been necessary to provide makeshift devices for supporting the workpiece on a face plate and then try to determine the concentricity of the diiferent surfaces by the uses of surface gauges, measuring blocks and the like. This has been very unsatisfactory and a great amount of time is necessary at the present time to set up each job for measurement. When a great number of these pieces are to be measured, the measuring operation is a major operation in a production schedule which greatly increases the cost of production. A particularly skilled workman is now necessary to set up the workpiece and measure the concentricity of the different surfaces thereof.

It is, accordingly, an object of my invention to provide a measuring device for measuring the concentricity of a plurality of surfaces on a cylindrical workpiece including end bores therein which is simple in construction, economical in cost, economical in manufacture, and eiiicient in operation.

Another object of my invention is to provide a measuring device for determining the concentricity of different diameters on a cylindrical workpiece and the end bores therein which is longitudinally adjustable to provide for varying lengths of workpieces and vertically adjustable to provide for varying diameters o'f workpieces.

Another object of my invention is to provide novel indicating means on a vertically movable V-shaped support in which compensation is made in accordance with the angle of the V-shaped support.

Other objects of my invention will become evident from the following detailed description, taken in conjunction with the accompanying drawings, in which Fig. 1 is a plan view of my novel measuring device;

Fig. 2 is a side elevational view of my novel measuring device;

Fig. 3 is a fragmentary view of the bottom side of my novel measuring device;

Fig. 4 is a side elevational view with parts broken away showing my novel adjustable support with the indicating means for determining the amount of vertical movement thereof; and

Fig. 5 is an end elevational View of my novel measuring device taken from the fixed end thereof.

Referring now to the drawings, Figs. 1 to 5, inclusive, show a fixed table I having a vertically extending support member 2 secured to the end thereof by screw bolts 3. The support member 2 has a V-shaped supporting jaw 4 to which is attached V-shaped blades 5 by screw bolts 5. Apertures 'i in the lower part of the support 2 are aligned with apertured bosses 8 integral with the table i and receive horizontally extending parallel guide bars 9. The guide bars 9 are secured in the apertures 'I and 8 by pressing or by any other suitable means. A movable table I0 has apertures II and I2 and apertured bosses I3 for receiving guide bars 9 for longitudinal movement thereon. The movable table I0 has vertically extending apertures I4 for receiving vertically extending guide bars I5, the guide bars I5 receiving apertured ends I6 of a support member I'I having a V-shaped jaw portion I8 centrally thereof. The guide bars I5 may be secured to the movable table IIJ or the support member I1 Without departing from my invention. Blades I9 are attached to the V-shaped jaw portion I8 of the support member I'I by screw bolts 29. The table l0 has a centrally disposed aperture 22 for receiving a anged lbushing 23 secured to the table Ill by screw bolts 24. The iianged bushing 23 has a threaded portion 25 for threadably en gaging the threaded portion 26 of a threaded lifting member 2'I having horizontal indicating lines 28, circumferential indicating lines 29, and a knurled finger gripping portion 30 on the upper end thereof. The knurled portion 39 of the member 21 engages a pad 32 set in recessed portion 33 in the support member I1. The lead of the threads 26 on the member 2'I and indicating portions 28 and 29 thereof are designed so 'l hat the vertical height of a Work piece on the v-shaped support member or blades I9 may be determined. Short legs 40 are disposed on the table Ill and legs 4I and 42 are disposed on the support 2 to provide three-point suspension for the tables I and I0.

I will describe the operation of my invention with particular reference to Fig. 2, although any other cylindrical workpiece may be accommodated. One of the larger diameters of the work piece is disposed in the V-shaped blades 5 in the iixed support 2 and a smaller diameter of the work piece is disposed on the adjustable V- shaped blades I9 of the support I'I as shown in Fig. 2. The table i0 is moved longitudinally to provide for the varying lengths of work pieces. Working with the known diameter of the small end of the work piece, the member 2l is rotated until indications 28 and 29 thereon show that the support ll is raised to the point where the axis of the work piece should be absolutely parallel with the top of the work tables I and I0. Surface gauges, measuring blocks, or any other suitable measuring instruments or devices may be used on the tables I and IIJ and/or on a `face plate (not shown) on which the measuring device is mounted to determine the concentricity of the different inside and outside diameters Vof the work piece. End bores, counterbores, and all outside diameters may be measured for concentricity with my novel device.

It will be evident from the foregoing description that I have provided a novel measuring device for determining the concentricity of a plurality oi diameters of a cylindrical fwork piece and also to determine the concentricity of end bores and counterbores therein which may be adjusted to provide for quick measurement of various lengths of work pieces and various diameters of work pieces, and which may be utilized by semi-skilled workmen .and -still obtain perfect measurements in a minimum of time. I have also provided a means for measuring concentricity of the different inside and outside diameters of-a work piece which requires no initial set-up, which is portable, and which is simple and highly eicient.

Various changes may be made in the specic embodiment of my invention without `dejlartin'g from the spirit thereof, or yfrom the scope ofthe appended claims.

What I claim is:

l. A portable precision ,measuring device comprising a table, a V-shapejd support oneneside of said table, guide Imembers extending nutwardly from said table,a secondtablermovable on said kguide mem-bersiin-parallel relationship to first mentioned table, agvertically.adjustable, V-shaped support on thesidefof -said movable table adjacent to thesupport on :sa-id rstfmenticnedtable, said supportsibeingin .alignment with each other, means for :moving said-adjustable support on said movabletable vertically and means for indicating the amount of vertical movement of said adjustable support.

2. A portable precision measuring device. comprising a iixed table, a V-shaped `support on said table, parallel guide bars-)extending outwardly from said table, a second table movable4 on said guide bars, an adjustable :Vfshaped fsupport movable vertically onsaid secondtablein alignment with said V-shaped support andsaid flrst mentioned table, means for movin'gfsaid adjustable support vertically, and means for indicating the vertical movement of said adjustable support.

3. A portable precision measuring device as set forth in claim 2 wherein vertically extending guide bars are provided for steadying said adjustable support upon vertical movement thereof.

4. A precision measuring device comprising a xed table, a vertically extending V-shaped support member attached to said table, guide bars parallel to each other extending outwardly from said table, a second table movable on said guide bars, a vertically adjustable V-shaped support member .in alignment with the vertically extending V-shaped support member on said rst mentioned table, means for moving said support member vertically, and indicating means for measuring the amount of movement of said adjustable support.

5. A precision measuring device as set forth in claim 4 wherein the top surfaces vof said tables are in the same horizontal plane.

6. A precision .measuring device as set forth in claim 4 wherein said adjustable support member on said second table comprises a Veshaped saddle, guide bars for said saddle, and a vertically extending screw mem'ber for moving said saddle vertically on said guide bars.

7. A 4precision measuring device as set forth in claim 4 wherein said vertically adjustable support member on said second table comprisesa vertically movable saddle having a AV-shaped support portion, guide means for said saddle, and a vertically extending screw member having a ringergripping portion and having calibrations thereon for indicating theamount of movement of said saddle vertically on said guide means.

8.,A precision measuring deviceas set forth in claimfi Ywherein legs are disposed beneath said supporti member for elevating said tables.

OSCAR L. .SWANSON REFERENCES CITED The following references are of record `in the le of this patent:

UNITED STATES .PATENTS Number Name Date .410,414 Hall, Sr. Sept. #3, 1889 878,439 Wagniere Feb. 4, -1-908 1,339,448 .Forsman et al. May 11,-1920 `1,350,119 Staley Aug. 117, A19120 13585,4'90 Hainsworth May 18,v 1926 1,938,216 VDalllelell Dec. 5,*1933 159410,91() .Hickey Dec. 26,1933

OTHER REFERENCES Aviation, June 1945, p. 1'56. 

